from rest_framework import serializers
from .models import OperatorAccount, PlatformAccount, Video
import uuid
from django.db.models import Q


class OperatorAccountSerializer(serializers.ModelSerializer):
    id = serializers.IntegerField(read_only=True)  # ID是自动递增的整数字段
    
    class Meta:
        model = OperatorAccount
        fields = ['id', 'uuid', 'username', 'password', 'real_name', 'email', 'phone', 'position', 'department', 'is_active', 'created_at', 'updated_at']
        read_only_fields = ['created_at', 'updated_at', 'uuid']
        extra_kwargs = {
            'password': {'write_only': True}
        }


class PlatformAccountSerializer(serializers.ModelSerializer):
    operator_name = serializers.CharField(source='operator.real_name', read_only=True)
    platforms = serializers.SerializerMethodField()
    
    class Meta:
        model = PlatformAccount
        fields = ['id', 'operator', 'operator_name', 'name', 'platform_name', 'account_name', 'account_id', 
                 'status', 'followers_count', 'account_url', 'description', 
                 'tags', 'profile_image', 'last_posting',
                 'created_at', 'updated_at', 'last_login', 'platforms']
        read_only_fields = ['id', 'created_at', 'updated_at']
    
    def get_platforms(self, obj):
        # 不会在查询时调用，但需要实现该方法，默认返回空数组
        return []
    
    def to_internal_value(self, data):
        # 处理operator字段，可能是字符串格式的ID
        if 'operator' in data and isinstance(data['operator'], str):
            try:
                # 尝试获取对应的运营账号对象
                operator = OperatorAccount.objects.get(id=data['operator'])
                data['operator'] = operator.id  # 确保使用正确的ID格式
            except OperatorAccount.DoesNotExist:
                # 如果找不到对应的运营账号，保持原值，让验证器捕获此错误
                pass
            except Exception as e:
                # 其他类型的错误，如ID格式不正确等
                pass
        
        # 处理platforms字段，从数组中提取出第一个元素的信息
        if 'platforms' in data and isinstance(data['platforms'], list) and len(data['platforms']) > 0:
            data = data.copy()
            platform_data = data['platforms'][0]
            # 将platforms中的字段移到顶层
            if 'platform_name' in platform_data:
                data['platform_name'] = platform_data['platform_name']
            if 'account_url' in platform_data:
                data['account_url'] = platform_data['account_url']
            if 'account_id' in platform_data:
                data['account_id'] = platform_data['account_id']
            if 'account_name' in platform_data:
                data['account_name'] = platform_data['account_name']
            
            # 删除platforms字段，避免验证错误
            del data['platforms']
        
        # 处理tags字段，将列表转换为逗号分隔的字符串
        if 'tags' in data and isinstance(data['tags'], list):
            data = data.copy() if not isinstance(data, dict) else data
            data['tags'] = ','.join(data['tags'])
        
        return super().to_internal_value(data)
        
    def to_representation(self, instance):
        """将tags字符串转换为数组"""
        representation = super().to_representation(instance)
        if representation.get('tags'):
            representation['tags'] = representation['tags'].split(',')
        return representation


class PlatformDetailSerializer(serializers.Serializer):
    """平台详情序列化器，用于多平台账号创建"""
    platform_name = serializers.ChoiceField(choices=PlatformAccount.PLATFORM_CHOICES)
    platform_url = serializers.URLField()


class MultiPlatformAccountSerializer(serializers.Serializer):
    """多平台账号创建序列化器"""
    operator = serializers.PrimaryKeyRelatedField(queryset=OperatorAccount.objects.all())
    name = serializers.CharField(max_length=100, required=False, allow_blank=True)
    account_name = serializers.CharField(max_length=100)
    account_id = serializers.CharField(max_length=100)
    status = serializers.ChoiceField(choices=PlatformAccount.STATUS_CHOICES, default='active')
    followers_count = serializers.IntegerField(default=0)
    description = serializers.CharField(required=False, allow_blank=True, allow_null=True)
    # 使用CharField而不是ListField，我们会在to_internal_value和to_representation中手动处理转换
    tags = serializers.CharField(required=False, allow_blank=True, allow_null=True, max_length=255)
    profile_image = serializers.URLField(required=False, allow_blank=True, allow_null=True)
    last_posting = serializers.DateTimeField(required=False, allow_null=True)
    platforms = PlatformDetailSerializer(many=True)
    
    def to_internal_value(self, data):
        # 处理tags字段，将列表转换为逗号分隔的字符串
        if 'tags' in data and isinstance(data['tags'], list):
            data = data.copy()
            data['tags'] = ','.join(data['tags'])
        
        # 处理operator字段，可能是字符串类型的ID
        if 'operator' in data and isinstance(data['operator'], str):
            try:
                # 尝试通过ID查找运营账号
                operator_id = data['operator']
                try:
                    # 先尝试通过整数ID查找
                    operator_id_int = int(operator_id)
                    operator = OperatorAccount.objects.get(id=operator_id_int)
                    data['operator'] = operator.id
                except (ValueError, OperatorAccount.DoesNotExist):
                    # 如果无法转换为整数或找不到对应账号，尝试通过用户名或真实姓名查找
                    operator = OperatorAccount.objects.filter(
                        Q(username=operator_id) | Q(real_name=operator_id)
                    ).first()
                    
                    if operator:
                        data['operator'] = operator.id
            except Exception as e:
                pass
        
        return super().to_internal_value(data)
        
    def to_representation(self, instance):
        """将tags字符串转换为数组"""
        representation = super().to_representation(instance)
        if representation.get('tags') and isinstance(representation['tags'], str):
            representation['tags'] = representation['tags'].split(',')
        return representation


class VideoSerializer(serializers.ModelSerializer):
    platform_account_name = serializers.CharField(source='platform_account.account_name', read_only=True)
    platform_name = serializers.CharField(source='platform_account.platform_name', read_only=True)
    
    class Meta:
        model = Video
        fields = ['id', 'platform_account', 'platform_account_name', 'platform_name', 'title', 
                 'description', 'video_url', 'local_path', 'thumbnail_url', 'status', 
                 'views_count', 'likes_count', 'comments_count', 'shares_count', 'tags', 
                 'publish_time', 'video_id', 'created_at', 'updated_at']
        read_only_fields = ['id', 'created_at', 'updated_at', 'views_count', 'likes_count', 
                           'comments_count', 'shares_count']
                           
    def to_internal_value(self, data):
        # 处理tags字段，将列表转换为逗号分隔的字符串
        if 'tags' in data and isinstance(data['tags'], list):
            data = data.copy()
            data['tags'] = ','.join(data['tags'])
        
        # 处理platform_account字段，可能是字符串格式的ID
        if 'platform_account' in data and isinstance(data['platform_account'], str):
            try:
                # 尝试获取对应的平台账号对象
                platform_account = PlatformAccount.objects.get(id=data['platform_account'])
                data['platform_account'] = platform_account.id  # 确保使用正确的ID格式
            except PlatformAccount.DoesNotExist:
                # 如果找不到对应的平台账号，保持原值，让验证器捕获此错误
                pass
            except Exception as e:
                # 其他类型的错误，如ID格式不正确等
                pass
        
        return super().to_internal_value(data)
        
    def to_representation(self, instance):
        """将tags字符串转换为数组"""
        representation = super().to_representation(instance)
        if representation.get('tags'):
            representation['tags'] = representation['tags'].split(',')
        return representation